Institutes 2.8.22 — EXPOSITION OF THE MORAL LAW.
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**EXPOSITION OF THE MORAL LAW.**
The purport of this Commandment is, that the majesty of the name of God is to be held sacred. In sum, therefore, it means, that we must not profane it by using it irreverently or contemptuously. This prohibition implies a corresponding precept—viz. that it be our study and care to treat his name with religious veneration. Wherefore it becomes us to regulate our minds and our tongues, so as never to think or speak of God and his mysteries without reverence and great soberness, and never, in estimating his works, to have any feeling towards him but one of deep veneration. We must, I say, steadily observe the three following things:— First , Whatever our mind conceives of him, whatever our tongue utters, must bespeak his excellence, and correspond to the sublimity of his sacred name; in short, must be fitted to extol its greatness. Secondly , We must not rashly and preposterously pervert his sacred word and adorable mysteries to purposes of ambition, or avarice, or amusement, but, according as they bear the impress of his dignity, must always maintain them in due honour and esteem. Lastly , We must not detract from or throw obloquy upon his works, as miserable men are wont insultingly to do, but must laud every action which we attribute to him as wise, and just, and good. This is to sanctify the name of God. When we act otherwise, his name is profaned with vain and wicked abuse, because it is applied to a purpose foreign to that to which it is consecrated. Were there nothing worse, in being deprived of its dignity it is gradually brought into contempt. But if there is so much evil in the rash and unseasonable employment of the divine name, there is still more evil in its being employed for nefarious purposes, as is done by those who use it in necromancy, cursing, illicit exorcisms, and other impious incantations. But the Commandment refers especially to the case of oaths, in which a perverse employment of the divine name is particularly detestable; and this it does the more effectually to deter us from every species of profanation. That the thing here commanded relates to the worship of God, and the reverence due to his name, and not to the equity which men are to cultivate towards each other, is apparent from this, that afterwards, in the Second Table, there is a condemnation of the perjury and false testimony by which human society is injured, and that the repetition would be superfluous, if, in this Commandment, the duty of charity were handled. Moreover, this is necessary even for distinction, because, as was observed, God has, for good reason, divided his Law into two tables. The inference then is, that God here vindicates his own right, and defends his sacred name, but does not teach the duties which men owe to men.
Source
source-manifest/institutes— Calvin, Institutes of the Christian Religion, tr. Beveridge 1845 (PD)- evidence_grade: D_doctrinal_textbook